Machine for bonding and debonding brake shoe linigs



Dec. 15, 1953 J. B. WILLIAMS MACHINE FOR BONDING AND DEBONDING BRAKE SHOE LININGS 3 Sheets-Sheet l Filed April 4. 1952 IHI Dec. 15, 1953 J. B. WILLIAMS 2,662,960

MACHINE FOR BONDING AND DEBONDING BRAKE SHOE L ININGS 26' I I "W2 /24 n INVENTOR L/l/z'iiz'ams BY W09@ ATTORNEYS D60 15, 1953 J. B. WILLIAMS 2,662,950

MACHINE FOR BONDING AND DEBONDING BRAKE SHOE LININGS Filed April 4, 1952 3 Sheets-Sheet 3 f *,QlE-BY Mv@ l uil 29 ATTORNEYS- Patented Dec. 15, 1953 UNITED STATES ATENT OFFICE MACHINE FOR BONDING AND DEBONDHN'G BRAKE SHOE LININ GS 14 Claims. 1

This invention relates to a machine and method for bonding and le-bonding linings to brake shoes.

More particularly, the invention relates to electrical means for heating the lining of a brake shoe, whereby to cause the shoe to adhere thereto, the shoe and lining being tightly pressed together.

One important object of the invention is to provide a novel machine of the above character, the parts of which may be assembled in the ield so that the machine may be transported in disassembled condition.

Another important object of the invention is to provide a machine havingI means insuring uniform pressure between the brake shoe and lining while undergoing bonding.

A further object of the invention is to provide a machine of this description having a novel arrangement oi supporting members for holding a brake shoe and lining ready for bonding.

A still further object of the invention is to provide, in a machine of this character, a novel arrangement of an electrical contact member for engaging the brake shoe during bonding and debonding.

A still further object of the invention is to provide means for insuring proper action of a hydraulic pressing device in such manner as to force the shoe and lining together at substantially uniform pressure.

Yet another object of the invention is to provide means whereby brake shoes and lining of different widths may be assembled for action by the machine.

Again, it is an object of the invention to provide improved process for bonding and debonding brake shoes and linings.

With the above and other objects in View, as will be hereinafter described, the invention consists in general of the novel method set forth and of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the claims.

In the drawings:

Figure l is a side elevation of the improved machine, 'the view being partly in section,

Figure 2 is an end elevation of the machine as shown in Figure l,

Figure 3 is an enlarged fragmentary section on line 3 3 of Figure l,

Figure e is a section on line 4 4 of Figure 1,

Figure 5 is a `perspective View showing a pair of the contact members, their mounting and the bus bar leads,

Figure 6 is a perspective view showing the electrical circuit ineens and the circuit closure used in this invention,

Figure 7 is a greatly enlarged View on line 'l-l' of Figure l,

Figure 8 is an enlarged View on line 8-8 of Figure 1,

Figure 9 is a fragmentary top plan view of one of the molds showing the positioning means for a brake shoe, and

Figure i() is a detail sectional view showing a part of a mold, a liner therein, the shoe engaged with the liner, and the contact members or brushes engaged with the shoe and illustrating by dotted lines the directional iiovv of current through the shoe.

In the form of the invention illustrated in the accompanying drawings, there is illustrated a bottom frame of rectangular form and having long members iii and short members l! preferably of angle iron and welded together at their ends. At each corner oi the frame, there is provided a tubular guide post i 2 and on top of these posts is tted a cap I3 to which the upper ends oi posts l2 are secured by means of Allen screws ifi. The upper ends of the posts I2 are threaded as shown in Figure l and carry adjusting nuts i5. From the corners of the bottom frame extend diagonal members i6 which support a hydraulic cylinder Il located centrally of the bottom frame. This cylinder may be supplied with fluid from any desired source through the valved pipe i8 and, when desired to relieve the pressure on the cylinder, the fluid may be drawn 01T through the exhaust pipe i5, which is also a valved pipe. Fitted in the cylinder i l is a plunger 20 which carries on its upper end a rectangular platform 2l, provided with an upstanding peripheral flange 22. Within this ange is located a series of individually movable plates 23a on each of which is mounted a mold 23. Extending upwardly from the platform are supporting bars 24 and the upper ends of these bars are X- edly attached to a lat frame 25 which surrounds the upper parts of the molds 23 and is provided at each corner with an opening 26 so that the hat frame 2&2 is slidably tted on the posts l 2. An angle iron post bracing frame 25a has the ends of its members securely welded to the posts I2 about midway of their heights.

Each of the molds 23 is arranged to carry a brake shoe and its lining. To this end the upper edge or" each mold is provided with a semi-circular notch 2i, the central part of which is recessed as at 28 so that a pair of side flanges 29 'is arranged on the mold in order that a brake What is claimed as new, is:

l.. ln a bonding machine of the class described, frame, a platform mounted on said frame for ertieally guided movement, hydraulic meant rer moving said platform, mold supporting plates carried by platform, molds carried by said plates, and pairs of spaced electrical contact members supported within the frame in vertical alignment with respective molds.

2. In a bonding machine of the class described, frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, each of said molds having a semi-circular notch in its upper edge, said notch being recessed to form a channel throughout its length, pairs of spaced electrical contact members supported Within the frame in vertical alignment with respective molds.

3. In a bonding machine of the class described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, springs arranged in sets and spaced uniformly between the mold supports and platform, and pairs of spaced electrical contact members supported Within the frame in vertical alignment with respective molds.

e. In a bonding machine of the class described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, each of said molds having a semi-circular notch in its upper edge, said notch being recessed to form a channel throughout its length, springs arranged in sets and spaced uniformly bet reen the mold supports and platform, and pairs of spaced electrical contact members supported within the frame in vertical alignment uf'ith reu spective molds.

5. In a bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced electrical contact bers al "ned above said molds, and carrier means suppor,.1ng said contact members for vertical movement on the frame.

6. In bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced electrical contact members aligned above said molds, carrier means supporting said contact members for vertical movement on the frame, and stop means on said frame limiting downward movement of said last named means.

7. In a bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said 'el tes, pairs of spaced electrical contact members ned above said molds, carrier means supporting said contact members for vertical movement on the frame, stop means on said frame limiting downward movement of the carrier means, and springs yieldably holding said carrier means against said stop means.

8. In a bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced contact members aligned above said molds, carrier means supporting said contact members for vertical movement cn the frame, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

9. In a bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced contact members aligned above said molds, carrier means supporting said contact members for vertical movement on the frame, stop means on said frame limiting downward movement of said last named means, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

l0. In a bonding machine of the kind described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced contact members aligned above said molds, carrier means supporting said contact members for vertical movement on the frame, stop means in said frame limiting downward movement of the carrier means, springs yieldably holding said carrier means against said stop means, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

1l. In a bonding machine of the class described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said plates, pairs of spaced contact members aligned above said molds, carrier means supporting said contact members for vertical movement on the frame, stop means on said frame limiting down ward movement of the carrier means, springs yieldably holding said carrier means against said stop means, means for adjusting the tension of said springs, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

l2. In a bonding machine of the class described, a frame, a platform mounted on said frame for vertically guided movement, hydraulic means for moving said platform, mold supportinG plates carried by said platform, molds carried by said plates, each of said molds having a semi-circular notch in its upper edge, said notch being recessed to form a channel throughout its length, pairs of spaced contact members aligned above said molds, carrier means supporting said contact members for vertical movement on the frame, stop means on said frame limiting downward movement of the carrier means, springs yieldably holding said carrier means against said stop means, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

13,; In a. bondingvmachine of the ,classdescribed aframe, a platform mounted on said frame for vertically, guided movement, hydraulic means for moving said platform, mold supporting plates carried by said platform, molds carried by said platessprings arranged in sets and spaced uni-- formly` between the supporting plates and platform, pairs of spaced contact members aligned abovefsaidv molds, carrier means supporting said contact members for vertical movement on the frame, stop means on said frame limiting downward movement of the carrier means, springs yieldably holding said carrier4 means againstv said stop means, means for adjusting the tension of. saidl springs, circuit connections.. for said con- L tactmembers, and switch means for said-circuit connections opened and closed as.I the, carrier means moves upwardly and downwardly.

14. In a bonding-machine of the classdescribed, a frame, a platform mounted on saidv framefor vertically guided movement, hydraulic means for movingY saidv platform, mold supporting plates carried by said platform, molds carried byv said plates, each of said molds having a semi-circular notch in its upper edge, said notch `being recessed to form a channel throughout its length, springs arranged in sets and spaced uniformly between the supporting plates and platform, pairs of spaced contact members aligned abovesaid molds,

carrier means supporting. said. contact members for. verticalmovement on the frame, stop means on' said frame limiting downward movement of the carrier means, springs yieldably holding said carrier means against said stop means, means for adjusting the tension of the last springs, circuit connections for said contact members, and switch means for said circuit connections opened and closed as the carrier means moves upwardly and downwardly.

JENNINGSl B. WILLIAMS.

References Citedin the le of this patent UNITED STATES PATENTS Number Name Date 6653575' Muggenburg Jan. 8, 1901 861,418l Wright July 30, 1907' 1,008,528 Cruse Nov. 14, 1911 1,803,779 Stevens May 5, 1931 2,204,617 Peel et al June 18, 1940 2,209,141 Schnell July 23, 1940 2,332,792 Gross et al. Oct. 26, 1943 2,404,165 Carver July 16, 1946 2,416,427V Bonawit et al. Feb. 25, 1947 2,479,375 Langer Aug. 16, 1949 2,520,978 Super Sept. 5, 1950 2,554,884 Smith et al May 29, 1951 2,626,344 Whari, Jr. Jan. 20, 1953 

